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Related Concept Videos

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Association Areas of the Cortex

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Association areas are regions of the cerebral cortex that do not have a specific sensory or motor function. Instead, they integrate and interpret information from various sources to enable higher cognitive processes such as memory, learning, and decision-making. Some key association areas include the following:
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The somatosensory cortex in the parietal lobes is crucial for interpreting sensory data such as touch, temperature, and proprioception. The somatosensory cortex, situated in the parietal lobes, plays a vital role in interpreting sensory information like touch, temperature, and proprioception—awareness of body position. This specialized brain region features an organized structure wherein neurons at the top primarily process sensations originating from the lower body. In contrast, those at...
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The cerebral cortex, the brain's outermost layer, is pivotal in processing complex cognitive tasks, emotions, and various sensory inputs and executing voluntary motor activities. This intricate structure is divided into three primary functional areas: the motor areas, sensory areas, and association areas.
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Related Experiment Video

Updated: Feb 24, 2026

Investigating Object Representations in the Macaque Dorsal Visual Stream Using Single-unit Recordings
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Conversion of object identity to object-general semantic value in the primate temporal cortex.

Keita Tamura1, Masaki Takeda1,2, Rieko Setsuie1

  • 1Department of Physiology, University of Tokyo School of Medicine, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan.

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Summary

Researchers found that specific neurons in the perirhinal cortex encode learned object attributes. Stimulating these memory neurons influences monkeys

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Area of Science:

  • Neuroscience
  • Cognitive Science
  • Visual Perception

Background:

  • The perirhinal cortex is crucial for object recognition and memory.
  • Understanding how the brain decodes learned object attributes from neural activity is a key challenge.

Purpose of the Study:

  • To investigate whether object identity or learned attributes are decoded from perirhinal cortex activity.
  • To determine the neural mechanisms underlying mnemonic judgments of objects.

Main Methods:

  • Combined monkey psychophysics with optogenetic and electrical stimulation techniques.
  • Targeted stimulation of specific neuronal populations within the perirhinal cortex.
  • Analyzed behavioral responses to assess mnemonic judgments.

Main Results:

  • Stimulating a focal spot of memory neurons biased monkeys to perceive objects as "already seen."
  • In an adjacent area, electrical stimulation caused a "never seen before" bias, while optogenetic stimulation still induced an "already seen" bias.
  • These differential effects suggest distinct neural populations encode different aspects of memory.

Conclusions:

  • Mnemonic judgments of objects arise from decoding nonphysical attributes encoded by perirhinal neurons.
  • The perirhinal cortex distinguishes between object identity and learned attributes.
  • This study provides insights into the neural basis of memory and recognition.